Graduated style- Qgis 2.12

Question

I try to represent point layer with different size and i want to have a color ramp also:

The problem is that when i choose the color method, the size method disappear:

I can change the color manually, but i seek for automatic way.

I also have red this How to deactivate the Color Ramp in QGIS graduated vector styling? and didn't got my wanted answer.

Answer 1

You have to use Rule-based style.

First you can generate breaks in Graduated tab, then in Rule-based classes will appear and you will be able to set sizes of markers.